Push pump



FIG. 1 is a right perspective view of a push pump showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof (right side view is a mirror image thereof);

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof. 

The ornamental design for a push pump, as shown and described. 